Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
848991 | Optik - International Journal for Light and Electron Optics | 2014 | 5 Pages |
Abstract
The spatial and temporal behavior of the tantalum plasma produced in air by third harmonic Nd:YAG laser (0.6 GW cm−2) has been studied using optical emission spectroscopy. Excitation temperature and electron density have been estimated from the analysis of spectral data as well as their spatio-temporal evolutions. As the delay time increases from 400 to 2000 ns, the excitation temperature has found to decrease from 10,000 K to 7900 K. The value of Ne decreases continuously from 4 × 1018 near the zero position to 5 × 1017 in a linear approach along with the propagation axe of the plasma plume. Laser-supported consumption wave regime has been proposed to explain the propagation of the plasma.
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Authors
A. Alkhawwam, K. Alnama, A. Jazmati, M.D. Zidan,